AI Article Synopsis
- Organic-inorganic perovskite halides (OIPH) are promising for sensors detecting toxic gases, but lead toxicity raises concerns, leading to the search for lead-free alternatives.
- Researchers developed a methylammonium bismuth iodide (MABI) thin-film sensor using a one-step spin coating method, specifically for ammonia detection.
- The MABI sensor demonstrates significant performance with a gas response of 24%, quick response/recovery times, and maintains stability over several months, highlighting the potential of Bi-based materials for eco-friendly gas sensing.
Article Abstract
Organic-inorganic perovskite halides (OIPH) have emerged as a wonder material with growing interest in sensors detecting various toxic gases. However, lead toxicity represents a potential obstacle, and therefore finding lead-free cost-effective compatible materials for gas sensing applications is essential. In this work, methylammonium bismuth iodide i.e. (CHNH)BiI(MABI) perovskite thin films-based ammonia (NH) sensor was synthesized using an antisolvent-assisted one-step spin coating method. The MABI sensor shows a linear relationship between the responsivity and concentration of NHwith excellent reversibility, high gas responsivity, and humidity stability. The MABI thin-film sensor exhibits a maximum gas response of 24%, a short response/recovery time i.e. 0.14 s /8.15 s and good reversibility at 6 ppm of NH. It was observed that MABI thin films based sensors have excellent ambient stability over a couple of months. This work reveals that it is feasible to design high-performance gas sensors based on environmentally-friendly Bi-based OIPH materials.
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| http://dx.doi.org/10.1088/1361-6528/aca0f7 | DOI Listing |
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